TOPIC: Upgrade 1.91 to 2.0 - SQL error

I am trying to upgrade limesurvey system ver 1.91 to 2.0 and I get stuck on DB (mysql) upgrade. Message I get, first pass, is:

Internal Server Error
CDbCommand failed to execute the SQL statement: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '
`attribute_type` varchar(4) NOT NULL,
`visible` varchar(5) NOT NULL,
PRIMARY' at line 2

Problem solved: Limesurvey upgraded from 1.9.1 to 1.9.2 and then to 2.0;installation and upgrade of existing database went smoothly. Ergo, make sure to bring your Limesurvey server to 1.92 before attempting to upgrade to 2.0.